Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1985-05-15
1986-11-18
Stellar, George G.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 76, 360135, G11B 548
Patent
active
046239421
ABSTRACT:
A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors.
An advantageous use is for all types of disk drives, preferably FlexyDisk drives.
REFERENCES:
patent: 4084201 (1978-04-01), Hack et al.
patent: 4458274 (1984-07-01), Charlson et al.
patent: 4513331 (1985-04-01), Baker et al.
patent: 4513333 (1985-04-01), Young et al.
patent: 4542428 (1985-09-01), Yanagi
patent: 4562494 (1985-12-01), Bond
Baasch, H. J. et al., "Azimuth and Position Detection Method for a Magnetic Read/Write Head", IBM Technical Disclosure Bulletin, vol. 26, No. 7A, Dec. 1983, pp. 3343-3348.
Hack Joachim
Huber Walter
Kraus Gerold
Schulze-Berge Klaus
Sold Roland
BASF - Aktiengesellschaft
Stellar George G.
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